插件介绍
XPath助手使提取、编辑和评估任何网页上的XPath查询变得很容易。
重要提示:安装此扩展后，您必须重新加载任何现有的标签或重新启动Chrome扩展工作。
产品说明:
1. 打开一个新标签，并导航到任何网页。
2. 按Ctrl-Shift-X(或在OS X上按Command-Shift-X)，或单击工具栏中的XPath助手按钮，以打开XPath助手控制台。
3.当鼠标移到页面上的元素上时，按住Shift键。查询框将不断更新，以显示鼠标指针下面元素的XPath查询，结果框将显示当前查询的结果。
4. 如果需要，可以在控制台中直接编辑XPath查询。“结果”框将立即反映您的更改。
5. 重复步骤(2)关闭控制台。
如果控制台挡住了你的路，按住Shift键，然后将鼠标移到上面;它会移动到页面的另一边。
注意:当渲染HTML表格时，Chrome插入人工标签到DOM，这将因此显示在查询提取这个扩展。
XPath Helper makes it easy to extract, edit, and evaluate XPath queries on any webpage.
IMPORTANT: After installing this extension, you must reload any existing tabs or restart Chrome for the extension to work.
Instructions:
1. Open a new tab and navigate to any webpage.
2. Hit Ctrl-Shift-X (or Command-Shift-X on OS X), or click the XPath Helper button in the toolbar, to open the XPath Helper console.
3. Hold down Shift as you mouse over elements on the page. The query box will continuously update to show the XPath query for the element below the mouse pointer, and the results box will show the results for the current query.
4. If desired, edit the XPath query directly in the console. The results box will immediately reflect your changes.
5. Repeat step (2) to close the console.
If the console gets in your way, hold down Shift and then move your mouse over it; it will move to the opposite side of the page.
One word of caution: When rendering HTML tables, Chrome inserts artificial <tbody> tags into the DOM, which will consequently show up in queries extracted by this extension.
浏览器插件安装详细步骤：Chrome浏览器如何安装插件扩展
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